Strangely, this just happens when I am composing yet never in verbal discussions. Directing our imagination without a doubt costs vitality, and to get into that innovative stream we need a free personality without diversions. In any case, here and there it tends to be very irritating that my body is so touchy to inventive flood.
For me too, I use up so much energy through thinking up stuff to write, that it drains me, and I have to take breaks in between, to be able to continue writing. Taking breaks refreshes me.